<template>
   <view class="cart">
    <!-- 1 列表 -->
    <view class="cart-list">
      <view class="cart-item" v-for="(item,index) in cartList" :key="item.goods_id">
        <!-- 1 复选框 -->
        <view class="goods-chk">
          <u-checkbox
            :value="item.checked"
            shape="circle"
            active-color="red"
            @change="handleItemCheck(index)"
          ></u-checkbox>
        </view>
        <!-- 2 图片 -->
        <view class="goods-img">
          <u-image
            width="191rpx"
            height="191rpx"
            :src="item.goods_small_logo"
          ></u-image>
        </view>
        <!-- 3 信息 -->
        <view class="goods-info">
          <!-- 名称 -->
          <view class="goods-name u-line-2">{{item.goods_name}}</view>
          <!-- 价格和数量 -->
          <view class="goods-price-num">
            <view class="goods-price">￥{{item.goods_price}}</view>
            <view class="goods-num-tool">
              <view class="num-btn"  @click="handleNumUpdate(-1,index)">-</view>
              <view class="goods-vnum">{{item.nums}}</view>
              <view class="num-btn"  @click="handleNumUpdate(1,index)">+</view>
            </view>
          </view>
        </view>
      </view>
      </view>
    <!-- 2 统计 -->
    <view class="statistics">
      <view class="all-chk">
        <u-checkbox
          :value="checkAll"
          shape="circle"
          active-color="red"
          @change="handleAllCheck"
        >全选</u-checkbox>
      </view>
         <view class="all-price">
        合计: <text>￥{{checkedPrice}}</text>
      </view>
       
       <view  class="all-count">       
        <u-button
        @click="handleGoPay"
          type="error"
          shape="circle"
        >
        去结算({{checkedCount}})
        </u-button>      
        
        </view>

    </view>
    <!-- 2 统计 -->
  </view>
</template>

<script>
import {mapState,mapMutations,mapGetters} from 'vuex'
export default {
  computed:{
    ...mapState({
      cartList:(state)=>state.cart.cartList
    }),
    checkAll(){
      return(this.cartList.length&&this.cartList.every(item=>item.checked))
    },
    ...mapGetters("cart",["checkedPrice","checkedCount"])

  },
  methods:{
    ...mapMutations(["cart/cartGoodsChecked","cart/cartGoodsNumUpdate","cart/cartGoodsRemove","cart/cartAllGoodsChecked"]),
    handleItemCheck(index){
        this["cart/cartGoodsChecked"]({index})
    },
    async handleNumUpdate(unit,index){
      if(this.cartList[index].nums===1&&unit===-1){
        const [err,result] =await uni.showModal({
           title: '提示',
           content: '您确定要删除该物品吗?',
           showCancel: true,
           cancelText: '取消',
           cancelColor: '#000000',
           confirmText: '确定',
           confirmColor: '#3CC51F',
         });
        //  console.log(result)
        if(result.confirm){
          this["cart/cartGoodsRemove"]({index})
        }
           
      }else{
        this["cart/cartGoodsNumUpdate"]({unit,index})
      }
    },
    handleAllCheck(){
      const checkAll=!this.checkAll
      this["cart/cartAllGoodsChecked"]({checked:checkAll})
    },
    handleGoPay(){
      if(this.checkedCount===0){
        uni.showToast({
          title:"您还没选中商品",
          icon:"none"
        })
      }else{
        uni.navigateTo({url:"/pages/pay/pay"})
      }
    }
  }
}
</script>

<style lang="scss">
.cart {
  padding-bottom: 111rpx;
  .cart-list {
    .cart-item {
      display: flex;
      padding: 10rpx;
      border-bottom: 1rpx solid #ccc;
      .goods-chk {
        flex: 1;
        display: flex;
        align-items: center;
        justify-content: center;
      }

      .goods-img {
        flex: 2;

        display: flex;
        align-items: center;
        justify-content: center;
      }

      .goods-info {
        color: #666;
        flex: 3;
        display: flex;
        flex-direction: column;
        justify-content: space-around;
        .goods-name {
        }

        .goods-price-num {
          display: flex;
          justify-content: space-between;
          .goods-price {
            color: $themeColor;
          }

          .goods-num-tool {
            width: 140rpx;
            height: 40rpx;

            display: flex;
            justify-content: space-between;
            .num-btn {
              border: 1rpx solid #ccc;
              border-radius: 50%;
              width: 40rpx;
              height: 40rpx;
              text-align: center;
              line-height: 40rpx;
            }

            .goods-vnum {
            }
          }
        }
      }
    }
  }
  .statistics {
    position: fixed;
    background-color: #fff;
    bottom: 0;
    left: 0;
    width: 100%;
    z-index: 100;
    border-top: 1rpx solid #ccc;
    display: flex;
    align-items: center;
    padding: 15rpx;
    .all-chk {
    }

    .all-price {
      flex: 1;
      color: #666;
      text {
      }
    }

    .all-count {
    }
  }
}
</style>